READ THE NOVEL- Chapters 1-31 - ERBzine

Tarzan on Mars
"I doubt it," said another. "Look you now—out there!
Already the nullifier is at work!"
When Tarzan and Kar Komak looked, they observed that
the invading fleets of warships were settling rapidly to the
ground beyond the valley's walls.
"Their buoyancy tanks are useless under the influence of
the nullifier beam," explained the Tarnathian. "Now the
fortress will fire upon them and the Holy Alliance fleets will
attack—and you will no doubt see the armies here begin their
grand attack overland."
As he finished speaking, they heard the dull booming
sounds of mighty guns above them, and far away on the
horizon they could see the smoke clouds rising where the
explosive radium shells wrecked havoc among the advanced
units of the invader's warships, which were already grounded.
The great fleets moved out swiftly from Tarnath and soared
high above the opposing forces, rifling them and dropping
bombs.
"They will be massacred," commented Tarzan.
"I know the temperament of most of those troops,"
returned Kar Komak, with a grim smile. "Bombs and shells
alone cannot discourage them. They will be disembarking
now and charging toward the Valley."
"They will be met by these great armies which are lying
in wait for them here," replied the Apeman. "Something
should be done. i think we had better try to escape and reach
the golden tower of which the Tarnathian speaks. If their
single nullifier can be destroyed, it will give John Carter the
advantage."
Kar Komak smiled. "And you say you are not Tharos
Pthan? Here you stand enclosed in a dungeon below the
fortress, yet you calmly harbor thoughts of conquering it. You
must be relying on secret powers which yet remain to be revealed.
As for myself, I can escape from here, for I know my
own powers—"
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